The effect of tungsten carbide particles content in a weld deposit on its abrasion resistance

U radu se daje analiza naslage zavara koja sadrži čestice karbida volframa. U ispitivanju je primijenjen postupak elektrolučnog zavarivanja u zaštićenoj atmosferi miješanog plina s dva tipa žice s jezgrom. Izabrana elektroda s jezgrom tipa "F-Durit G" već sadrži čestice karbida volframa. Druga primijenjena opcija bila je elektroda s jezgrom tipa "Megafil A 864M" s povećanim sadržajem borona. U drugoj su varijanti čestice karbida volframa veličine 1-2 mm dodane u zavar i tako je stvoren sloj od kompozitnog materijala. Za spomenuti pokus izabrana su dva različita nivoa parametara zavarivanja, a mi smo ispitivali svojstva završne naslage zavara, a naročito otpor na abraziju.This paper describes the study of a weld deposit which contains tungsten carbide particles. For testing the process of gas metal arc welding in a protective atmosphere of a mixed gas with two types of cored wires were used. The selected cored electrode of a "F-Durit G" type already contains the tungsten carbide particles. The second used option was a cored electrode of a "Megafil A 864M" type with an increased boron content. For the second variant tungsten carbide particles with a 1-2 mm size were added to the weld pool, and a composite material layer was thus created. For the mentioned test two different levels of welding parameters were selected and the final weld deposit properties, particularly their abrasion resistance, were examined

Czech Social Science Data Archive

The Czech Social Science Data Archive (CSDA) is a national social science data centre in the Czech Republic which acquires, processes and archives datasets from Czech and international social research and makes these data publicly available for research and training purposes. CSDA also participates in networks of transnational data access, facilitates Czech participation in international comparative surveys, and promotes secondary data analysis in social science research. CSDA is the Czech node within the pan-European distributed research infrastructure ‘Consortium of European Social Science Data Archives’ (CESSDA) and is also the CESSDA Service Provider in the Czech Republic. The collection of works is available on-line on the following address: http://ufallab.ms.mff.cuni.cz/~hlavacova/WDH2015/wdh2015_sbornik.pd

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Sociological Data Archive (SDA) of the Institute of Sociology collects computerised data files from sociological surveys. Czech survey research has a long tradition, but it was deeply affected by communist regime. A debate concerning the formation of a social science data archive was opened in the late 60s. The main access to the SDA'data library is provided on the Internet. The Archive pays a great attention to promoting secondary analysis and co-operates in large research projects